her husband, mark kelly, an nra ceo wayne lapierre also testified. this hearing is just under four hours. [no audio] >> we have more than 200 people here today and hundreds more watching on our committee web cast. i expect everybody in this room to be respectful of the senators and the witnesses speaking about this very serious subject. i do not want applause for or against any position. the capitol police have been notified to remove any audience interference in an effort to have orderly conduct for that. that is a warning i give the many hearings. we will hear a lot of perspective on gun violence. i will give opening statements. but we have a former member of congress here, gaby giffords who will give a brief message and believed and captain kelly, thank you for your help in bringing your wife here. ms. giffords - >> ok. thank you for inviting me here today. this is an important conversation for our children, for our communities, for democrats and republicans. speaking is difficult but i need to say something important. violence is a big problem. t